Comparison

Ultrasonic Analyzer vs Spectrum Analyzer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ultrasonic Analyzer

This app provides real-time audio analysis with visual representations of sound frequencies. It allows users to listen to and analyze ultrasounds, with options for transposed playback and slowed-down analysis of inaudible sounds. It supports various sampling rates and offers detailed charting and measurement tools.

Highlights
  • Real-time spectrum analysis
  • Spectrogram and oscilloscope views
  • Octave RTA analyzer
  • Transposed ultrasound listening
  • Slowed-down playback
  • High sampling rates up to 384kHz
  • Zoom and pan capabilities
Read full description

Ultrasonic Analyzer is a real-time spectrum, spectrogram, oscilloscope, and octave RTA analyzer for your iPhone or iPad. It provides a visual representation of ultrasounds using a sampling rate of up to 384kHz**. You can listen to transposed ultrasounds* and analyze them in real time. For sounds that are normally inaudible, a slowed-down playback option is also available. Ultrasonic Analyzer can be used to analyze the calls of various animals (e.g., bats, dolphins), measure the frequency response of high-end audio equipment, or evaluate ultrasonic sensors. Additionally, it allows you to analyze short imported audio files within a spectrogram context. Features - Sampling rates: 44.1kHz, 48kHz, 96kHz, 192kHz, 200kHz, 250kHz, 384kHz** - Real-time transposed ultrasound listening during recording* - Spectrogram analyzer: Color and black & white modes - Spectrum analyzer - Oscilloscope (full FFT window size) - Octave RTA analyzer: Bands – full, 1/3, 1/6, 1/12 (RMS values) - Max/min Octave RTA values - dBFS Meter - Fast real-time response - Adjustable spectrogram frequency resolution - Configurable time interval between FFT computations, with values as low as 1ms or even lower - Fast Fourier Transform (FFT) - FFT window sizes: 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536 - Recording trigger: Automatically triggers based on specified frequency bands - Zoom and pan capabilities for all charts - Measurement tools available in all charts - Playback analysis - Transposition during playback - Slow-down playback: Transpose octaves down for easier analysis - Picture-in-Picture (PIP) mode: Allows simultaneous spectrogram analysis with a secondary chart (Octave RTA, Spectrum, or Oscilloscope) - Audio input support: Built-in microphone, external microphone (via USB camera adapter or iPhone/iPad dock connector – Core Audio compliant devices) - Sharing options: Share charts and audio recordings via email, social networks, or clipboard - Exporting capabilities: Save audio recordings (WAV) and image charts (PNG) to iOS Document Browser - Audio file import: Load short audio files from other apps or the iOS Document Browser - Supported audio formats: WAV, CAF, AAC, MP3 - Automatic sample rate conversion for imported files - Frequency scale options: Linear and logarithmic - Amplitude scale options: Linear and logarithmic (dBFS) - dBFS Meter weighting: dBZ (linear) - Adjustable spectrogram length (dependent on resolution settings) Tested with (via USB adapter): - Dodotronic Ultramic200K, Ultramic250K, Ultramic384K - Pettersson M500-384 - Avisoft UltraSoundGate 116Un Make sure you are using the latest iOS update. *Requires an external microphone with ultrasonic capabilities connected via a USB adapter. **Real-time analysis at a 96kHz sample rate or higher is only possible with an external USB microphone. Alternatively, you can import files recorded on an external device for non-real-time analysis.

About

Spectrum Analyzer

Visualize audio frequencies with real-time analysis. Features include a sound level meter, multichannel harmonic analysis, and adjustable graphical representations. Gain insights into your sound environment with advanced tools.

Highlights
  • Sound level meter
  • Multichannel harmonic analysis
  • Adjustable graphics
  • AI-powered sound source analyzer
  • Real-time analysis
  • FFT analysis
Features
Read full description

Spectrum Analyzer is a pro audio tool with sound level meter, multichannel harmonic analysis and detailed graphical representation. Learn something new about your sound environment with real-time analysis! FEATURES: - sound level meter; - harmonic analyzer; - adjustable graphics; - AI-powered sound source analyzer. SOUND LEVEL METER - precise measurement of sound and noise level - real-time results HARMONIC ANALYZER - multichannel FFT analysis; - adjustable parameters; - graphical representation. ADJUSTABLE GRAPHICS - various graphics and diagram types; - zoom of selected chart areas. This app offers subscriptions. The paid version includes AI noise detection, immersive 3D visualization, and customizable settings. The free version offers dB/Hz measurement, 2D mode, and limited visualization options. Privacy Policy: https://musicbreath.com/privacy Terms Of Use: https://musicbreath.com/tos

Screenshots

Ultrasonic Analyzer3 screens
Spectrum Analyzer3 screens

Verdict

The call

The clearest difference is review sentiment: Ultrasonic Analyzer at 57% against Spectrum Analyzer's 5%. Ultrasonic Analyzer also leads on in-app purchases (none vs 13) and ads (none vs shown). Spectrum Analyzer's advantage is price (Free vs $19.99) and update cadence (fortnightly vs every 4 months). On device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Spectrum Analyzer is free to download; Ultrasonic Analyzer costs $19.99 up front. Spectrum Analyzer sells 13 in-app purchases, starting at $4.99 per 7 days. Ultrasonic Analyzer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Spectrum Analyzer holds the better App Store score, 4.2 against 3.9. That said, the two scores are not equally well evidenced: Spectrum Analyzer has 197 ratings behind it against 35, so its average is the more settled of the two. Written reviews complicate that: 57% of Ultrasonic Analyzer's written reviews are positive against 5% of Spectrum Analyzer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Ultrasonic Analyzer ships an update every 4 months, Spectrum Analyzer fortnightly. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

Scorecard9 real differences · 1 level
Ultrasonic Analyzer versus Spectrum Analyzer: the parameters behind the verdict, then further details
ParameterUltrasonic AnalyzerSpectrum Analyzer
Price$19.99Free — better
Rating3.9 (35 ratings)4.2 (197 ratings) — better
Positive reviews57.1% of reviews — better5.0% of reviews
Number of ratings35197 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.4 — better16.0
Further details — not scored
Size2 MB132 MB
Age rating4+4+
DeveloperDEXUS Pawel KrzywdzinskiMusic Breath

Customer experience

Ultrasonic Analyzer

All ratings35 ratings
Positive71.4%
Neutral5.7%
Negative22.9%
Written reviews28 reviews
Positive57.1%
Neutral3.6%
Negative39.3%

Spectrum Analyzer

All ratings197 ratings
Positive77.2%
Neutral6.6%
Negative16.2%
Written reviews241 reviews
Positive5.0%
Neutral5.0%
Negative90.0%

Bugs and requests

Ultrasonic Analyzer

Not enough reviews yet to summarise bugs or requests.

Spectrum Analyzer

Reported bugs

10 issues
  • App becomes unusable after iOS 16 update
  • Crashes immediately on iPhone 5 with iOS 7
  • Cannot exit app on iPhone X without reboot
  • App freezes when changing settings or views
  • Inaccurate frequency readings
Show 5 more
  • Slow and unresponsive performance
  • App hijacks device sound settings
  • Accidental in-app purchases triggered by home button
  • Subscription charges without clear user consent
  • App locks users into year-long subscriptions with no cancellation option

Requested features

7 requests
  • Audio file import functionality
  • Customizable background colors for chroma key compatibility
  • Ability to record audio instead of only analyzing
  • Better documentation and help files
  • Improved sensitivity for detecting soft sounds
Show 2 more
  • Dark mode option
  • Upfront pricing disclosure before download

In-app purchases

None

Ultrasonic Analyzer

No in-app purchases

13 purchases

Spectrum Analyzer

Subscriptions9
  • Pitch Finder: Audio Visualizer3 Days trial$4.997 Days
  • Pitch Finder: Audio Visualizer3 Days trial$9.991 Month
  • One Month Sale$9.991 Month
Show 6 more
  • 1 Week Subscription3 Days trial$9.997 Days
  • 1 Year Sub. with discount$19.991 Year
  • 1 Month Subscription$19.991 Month
  • 3 Month Subscription$25.993 Months
  • 1 Year Subscription3 Days trial$39.991 Year
  • 2 months subscription3 Days trial$39.992 Months
One-time4
  • No Ads$9.99
  • Additional Settings Controls$15.99
  • Full Pack + No Ads$19.99
Show 1 more
  • Get More$19.99

Questions

Is Ultrasonic Analyzer free?
Ultrasonic Analyzer costs $19.99, with no in-app purchases.
Is Spectrum Analyzer free?
Spectrum Analyzer is free to download, with in-app purchases available.
Which has better reviews, Ultrasonic Analyzer or Spectrum Analyzer?
Spectrum Analyzer is rated higher. Ultrasonic Analyzer averages 3.9 out of 5 from 35 ratings, while Spectrum Analyzer averages 4.2 from 197 ratings.
Do Ultrasonic Analyzer or Spectrum Analyzer have ads?
Spectrum Analyzer shows ads; Ultrasonic Analyzer does not.
Which is updated more often, Ultrasonic Analyzer or Spectrum Analyzer?
Ultrasonic Analyzer ships an update every 4 months, and Spectrum Analyzer fortnightly. Most recently, Ultrasonic Analyzer was updated on September 23, 2026 and Spectrum Analyzer on September 26, 2026.

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